[Bug 1914062] Re: NetworkManager-wait-online.service in 1.28.0-2ubuntu1 fails to start in LXC

[Stéphane Graber]

Christian submitted https://github.com/systemd/systemd/pull/18559 which
got turned into https://github.com/systemd/systemd/pull/18684 and has
now been merged in upstream systemd.

We've both tested the resulting systemd and can confirm that /run/udev is now properly populated.
Please cherry-pick those udevd fixes into Ubuntu's systemd.

** Changed in: systemd (Ubuntu)
     Assignee: Christian Brauner (cbrauner) => (unassigned)

** Changed in: systemd (Ubuntu)
       Status: Fix Released => Triaged

** Changed in: systemd (Ubuntu)
   Importance: Wishlist => High

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https://bugs.launchpad.net/bugs/1914062

Title:
  NetworkManager-wait-online.service in 1.28.0-2ubuntu1 fails to start
  in LXC

Status in lxd package in Ubuntu:
  Won't Fix
Status in network-manager package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Triaged

Bug description:
  This regresses systemd's autopkgtest because it expects the system in
  the container to reach running state, but the system ends up in
  degraded state due to the service failing.

  https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-hirsute/hirsute/amd64/s/systemd/20210112_185712_ff570@/log.gz
  ...

  ======================================================================
  FAIL: test_no_failed (__main__.ServicesTest)
  No failed units
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "/tmp/autopkgtest.fFC3Lw/build.xLc/real-tree/debian/tests/boot-and-services", line 68, in test_no_failed
      self.assertEqual(failed, [])
  AssertionError: Lists differ: ['● NetworkManager-wait-online.service loa[42 chars]ine'] != []

  First list contains 1 additional elements.
  First extra element 0:
  '● NetworkManager-wait-online.service loaded failed failed Network Manager Wait Online'

  + []
  - ['● NetworkManager-wait-online.service loaded failed failed Network Manager '
  -  'Wait Online']

  ----------------------------------------------------------------------
  Ran 23 tests in 4.435s
  ...

  Reproducible locally by installing n-m from -proposed, then restarting
  the system in the LXC container.

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